2A5X5-PT250BAamplifier

DATE 2022-12-14 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2A5X5-PT250BA Product Name: amplifier Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: (List here the documents for which you are seeking confidentiality – for example ...)  Schematics  Block diagram  Operation description These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. <Signature> Name: Abe Brach Title: Manage Applicant Company: SOUND AROUND INC.

Date：2022-12-14 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize Compliance Testing, LLC to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). <Signature> Name: Abe Brach Title: Manage Applicant Company: SOUND AROUND INC.

DATE:2022-12-14 Federal Communications Commission Authorization & Evaluation Division 7345 Oakland Mills Road Columbia, Maryland 21046 Authority to Act asAgent Onourbehalf,IappointDongguan New Testing Centre Co., Ltd；3F, No. 1 the 1st North Industry Road, Songshan Lake Science &Technology Park, Dongguan, Guangdong, China, 523808. toactasouragentinthepreparationofthisapplicationforequipmentcertification.Icertifythatsubmitte ddocumentsproperlydescribethedeviceorsystemforwhichequipmentcertificationissought.Ialsoc ertifythateachunitmanufactured,importedormarketed,asdefinedintheFederalCommunicationsC ommission’sregulationswillhaveaffixedtoit a label identical to that submitted for approval with thisapplication. Forinstanceswhereourauthorizedagentsignstheapplicationforcertificationonourbehalf,Iack nowledgethatallresponsibilityforcomplyingwiththetermsandconditionsforcertification,stillres ideswith SOUND AROUND INC.；1600, 63 RD STREET, BROOKLYN N.Y., 11204, U.S.A. <Signature> Name: Abe Brach Title: Manage Applicant Company: SOUND AROUND INC.

Page 1 of 2 FCC-ID:2A5X5-PT250BA External photos Fig.1 (Model:PT250BA) Fig.2 (Model:PT250BA) Page 2 of 2 FCC-ID:2A5X5-PT250BA Fig.3(Model:PT250BA) Fig.4 (Model:PT250BA) Page 3 of 2 FCC-ID:2A5X5-PT250BA Fig.5(Model:PT250BA)

Page 1 of 1 FCC-ID:2A5X5-PT250BA Label and label location amplifier Model:PT250BA FCC ID:2A5X5-PT250BA This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Page 1 of 11 FCC-ID:2A5X5-PT250BA Internal Photos Fig.6(Model:PT250BA) Fig.7(Model:PT250BA) Page 2 of 11 FCC-ID:2A5X5-PT250BA Fig.8(Model:PT250BA) Fig.9(Model:PT250BA) Page 3 of 11 FCC-ID:2A5X5-PT250BA Fig.10(Model:PT250BA) Fig.11(Model:PT250BA) Page 4 of 11 FCC-ID:2A5X5-PT250BA Fig.12(Model:PT250BA) Fig.13(Model:PT250BA) BT Antenna Page 5 of 11 FCC-ID:2A5X5-PT250BA Fig.14(Model:PT250BA) Fig.15(Model:PT250BA) Page 6 of 11 FCC-ID:2A5X5-PT250BA Fig.16(Model:PT250BA) Fig.17(Model:PT250BA) Page 7 of 11 FCC-ID:2A5X5-PT250BA Fig.18(Model:PT250BA) Fig.19(Model:PT250BA) Page 8 of 11 FCC-ID:2A5X5-PT250BA Fig.20(Model:PT250BA) Fig.21 (Model: PT250BA) Page 9 of 11 FCC-ID:2A5X5-PT250BA Fig.22 (Model: PT250BA) Fig.23 (Model: PT250BA) Page 10 of 11 FCC-ID:2A5X5-PT250BA Fig.24 (Model: PT250BA) Fig.25 (Model: PT250BA) BT Antenna Page 11 of 11 FCC-ID:2A5X5-PT250BA

FCC‐ID:2A5X5‐PT250BA Page 1 of 1 Report No.:NTC‐ER2210005 RF Exposure Letter According to 447498 D01 General RF Exposure Guidance v05 The 1‐g and 10‐g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune‐up tolerance, mW)/(min. test separation distance, mm)] ·[√f(GHz)] ≤ 3.0 for 1‐g SAR and ≤ 7.5 for 10‐g extremity SAR, where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison Worse case is as below: [2402 MHz 2.965dBm（1.979 mW） output power] (1.979mW /5mm)·[√2.402(GHz)]= 0.6135<3.0 for 1‐g SAR Then SAR evaluation is not required

FCC TEST REPORT Report No. ...................................... : NTC-ER2210005 Applicant’s name ........................... : SOUND AROUND INC. Address .......................................... : 1600, 63 RD STREET, BROOKLYN N.Y., 11204, U.S.A. DONGGUAN NEW TESTING CENTRE CO., LTD ◎Address: 1F & 3F, No. 1 the 1st North Industry Road Songshan Lake Science & Technology Park Dongguan, People’s Republic of China 523808 Tel: +86-769-22212079 Web: http://www.ntc‐cert.com E-mail: [email protected] Dongguan New Testing Centre Co., Ltd E-mail： [email protected] 1F & 3F, No. 1 the 1st North Industry Road Songshan Lake Science & Technology Park Dongguan, People’s Republic of China 523808 Page 1 of 79 Report No.: NTC-ER2210005 TABLE OF CONTENTS Test Report Declare ...................................................................................................................... 3 1. Summary of test results ........................................................................................................... 6 2. General test information .......................................................................................................... 6 2.1. Description of EUT ................................................................................................................... 6 2.2. Detail models ............................................................................................................................. 7 2.3. Block diagram EUT configuration for test ............................................................................. 7 2.4. Test environment conditions ................................................................................................... 7 2.5. Measurement uncertainty ........................................................................................................ 8 2.6. Test Peripheral List ................................................................................................................... 8 2.7. Test Facility ................................................................................................................................ 9 3. Power Line Conducted Emission Test ................................................................................ 10 3.1. Test equipment ....................................................................................................................... 10 3.2. Block diagram of test setup ................................................................................................... 10 3.3. Power Line Conducted Emission Limits (Class B) ............................................................ 10 3.4. Test Procedure ........................................................................................................................ 11 3.5. Test Result ............................................................................................................................... 11 4. Radiated emission test ........................................................................................................... 14 4.1. Test equipment ....................................................................................................................... 14 4.2. Block diagram of test setup ................................................................................................... 15 4.3. Limit .......................................................................................................................................... 17 4.4. Test Procedure ........................................................................................................................ 18 4.5. Test result ................................................................................................................................ 19 5. Maximum Peak Output Power .............................................................................................. 26 5.1. Applied procedures / Limit ..................................................................................................... 26 5.2. Test procedure ........................................................................................................................ 26 5.3. Deviation from standard ......................................................................................................... 26 5.4. Test setup ................................................................................................................................ 26 5.5. TEST RESULTS ..................................................................................................................... 26 6. BANDWIDTH TEST ............................................................................................................... 31 6.1. Applied procedures / Limit ..................................................................................................... 31 6.2. Test procedure ........................................................................................................................ 31 6.3. Deviation from standard ......................................................................................................... 31 6.4. Test setup ................................................................................................................................ 31 Dongguan New Testing Centre Co., Ltd E-mail： [email protected] 1F & 3F, No. 1 the 1st North Industry Road Songshan Lake Science & Technology Park Dongguan, People’s Republic of China 523808 Page 2 of 79 Report No.: NTC-ER2210005 6.5. Test results .............................................................................................................................. 31 7. Carrier Frequencies Separated ............................................................................................ 36 7.1. Applied procedures / Limit ..................................................................................................... 36 7.2. Test …

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Inverted F Antenna Specification Summary ITEM ANT SPEC Model Name 2.4G ANT Horizontal Vertical 2400MHz 2400MHz2500MHz2400MHz2400MHz 2500MHz Center Frequency -1.26 -0.76 -0.58 -5.25 -2.46 -1.86 MAX. Gain -0.58dB Polarization Horizontal and Vertical Azimuth Beam Pattern Omni-directional Impedance 50 Ohm Antenna Length 38.20mm Manufacture ZHUHAI JIELI TECHNOLOGY CO.,LTD Antenna Photo & Length (mm) 333 Kexing Road, Nanping Town, Xiangzhou District, Zhuhai city Address Horizontal: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -40 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -1.26174 -30.0801 -7.18716 2450 -0.765802 -36.5604 -7.48023 2500 -0.585582 -22.0315 -6.59127 Vertical: 2400 MHz 2450 MHz 2500 MHz Power (dBm) Max: 0 Min: -30 Scale: 5/div Gain(dB) Frequency (MHz) Max Min Avg 2400 -5.2537 -22.1424 -12.4294 2450 -2.4652 -24.5837 -10.4702 2500 -1.86120 -29.5214 -9.20432 ANT Test Labs：Attestation of Global Compliance Co., Ltd.

Page 1 of 2 FCC-ID: 2A5X5-PT250BA Setup photos Model No: Model No:PT250BA Conducted emission test Radiated emission test 30MHz – 1GHz Page 2 of 2 FCC-ID: 2A5X5-PT250BA Above 1GHz